LSA vs Type A: When You Have a Choice (and Why It Matters)

Why This Matters

Here is a situation I see regularly: a facility has contaminated soil, low-level waste, or decommissioning debris that needs to ship. The health physics technician characterizes the material and reports the total activity. The shipping coordinator looks at the total activity, sees it is under A2, and reaches for a Type A package. The shipment goes out. Everyone is compliant. Nobody is wrong.

But they are leaving money on the table.

That same material — with its activity distributed throughout at low concentration — almost certainly qualifies as LSA material. And LSA material can ship in Industrial Packages, which are fundamentally simpler and cheaper than Type A containers. On a single shipment, the difference might be a few hundred dollars. On a multi-year decommissioning project with hundreds or thousands of shipments, you are looking at tens of thousands of dollars in unnecessary packaging costs.

I have worked with facilities that were using Type A drums for everything coming out of a radiological area — even material that clearly qualified as LSA-I. When we walked through the specific activity calculations, they realized they could switch to standard IP-1 drums for most of their waste stream. The cost savings on that project alone covered the time it took to do the characterization work ten times over.

Who Needs to Know This

This applies to anyone shipping bulk, low-concentration radioactive material:

• Decommissioning projects: Contaminated concrete, soil, piping, structural debris
• Radioactive waste operations: Evaporator bottoms, filter media, ion exchange resins, solidified waste
• Environmental remediation: Contaminated soil and water from legacy sites
• Nuclear facility maintenance: Low-activity waste from routine operations
• Research and medical facilities: Large-volume, low-concentration waste streams
• Uranium and thorium processing: Ores, concentrates, and process residues

Understanding the Overlap

The DOT regulations use two independent measurements to classify radioactive material for shipping:

• Total activity — the aggregate activity in the package, measured in Becquerels or Curies. This determines whether material is an excepted quantity, Type A quantity, or Type B quantity.
• Specific activity — the activity per unit mass, measured in Bq/g. This determines whether material qualifies as LSA (low specific activity) under 49 CFR 173.403.

These are not mutually exclusive. A 200-liter drum of contaminated soil might have:

• Total activity of 0.1 TBq — well under the A2 limit for many isotopes (Type A quantity)
• Specific activity of 3 × 10⁻⁵ A2/g — well under the LSA-II limit of 10⁻⁴ A2/g for solids

That drum qualifies under both classifications simultaneously. And that overlap is where the choice lives.

How the Regulations Create the Choice

49 CFR 173.427(b) states that LSA material must be packaged as one of the following:

1. Industrial Package (IP-1, IP-2, or IP-3) per the requirements of Table 6
2. DOT Specification 7A (Type A) package
3. Type B(U) or B(M) package
4. For domestic exclusive use under A2 quantity: packaging meeting general design requirements of 49 CFR 173.410

Option 1 is the LSA pathway. Options 2 and 3 are “over-packaging” — perfectly compliant, but more than the regulations require. The regulations do not force you into the most restrictive classification. If your material qualifies as LSA, you are allowed to use the less restrictive Industrial Package pathway.

The LSA Advantage: Why Industrial Packages Win on Cost

The cost difference between Industrial Packages and Type A packages comes down to design, testing, and certification requirements. Understanding what each package type demands explains why the gap is so significant.

Industrial Packages (IP-1, IP-2, IP-3)

• IP-1: Must meet the general design requirements of 49 CFR 173.410 — structurally sound, properly closed, no leakage under normal transport
• IP-2: IP-1 requirements plus free drop test (173.462) and stacking test (173.464)
• IP-3: IP-2 requirements plus Type A performance standards — essentially equivalent to a Type A package

Type A Packages

• Must meet 49 CFR 173.412 requirements
• Additional tests: water spray, free drop, compression, penetration
• Must maintain containment and shielding after all normal transport tests
• DOT Specification 7A certification required
• Typically engineered containers with certified closure mechanisms

Cost Comparison

Real-World Scenarios: Where the Choice Shows Up

Scenario 1: Bulk Contaminated Soil

A remediation project is removing 500 cubic meters of soil contaminated with Cs-137. Characterization shows:

• Average specific activity: 5 × 10⁻⁵ × A2/g (well under the LSA-II limit of 10⁻⁴ × A2/g)
• Total activity per drum: approximately 0.15 TBq (under A2 for Cs-137 = 0.6 TBq)

Without LSA classification: Each drum ships as Type A quantity in a DOT 7A certified drum. Hundreds of certified drums, full 7A documentation for each.

With LSA classification: Soil ships as UN2912, LSA-II in IP-2 Industrial Packages — standard steel drums that pass drop and stacking tests. Far less documentation overhead and significantly lower per-drum cost.

On a project this size, the packaging cost difference can easily reach $50,000 or more.

Scenario 2: Laboratory Waste

A research facility generates low-level liquid waste with multiple isotopes. The total activity per container is under A2, but the waste is aqueous with activity distributed throughout.

• If specific activity is ≤ 10⁻⁵ × A2/g (the LSA-II limit for liquids), ship as LSA-II in IP-2 (exclusive use) or IP-3 (non-exclusive use)
• If specific activity exceeds the LSA-II limit, the LSA pathway is not available — ship as Type A

Scenario 3: Decommissioning Debris

A nuclear facility is removing activated concrete and piping. The material has been characterized:

• Concrete rubble with Co-60 at specific activity of 2 × 10⁻⁵ A2/g — qualifies as LSA-II
• Total activity per B-25 box: 0.2 TBq (under A2 for Co-60 = 0.4 TBq)

The choice: Ship in IP-2 Industrial Packages (B-25 boxes that meet drop and stacking tests) rather than DOT 7A Type A containers. The B-25 box is a workhorse container for decommissioning waste — when it qualifies as IP-2, you avoid the Type A certification overhead entirely.

I worked with a decommissioning project that was ordering DOT 7A certified containers for all of their low-level waste. They had already purchased about 200 containers before someone on the team ran the specific activity numbers. It turned out that over 80% of their waste qualified as LSA-I or LSA-II. For the remaining shipments — several hundred more containers — they switched to Industrial Packages and saved roughly $120 per container. It was one of those situations where a few hours of calculation work up front would have changed the procurement strategy from day one.

How to Recognize the Choice

Not every shipment involves this decision. The overlap only exists when material meets both criteria simultaneously. Here is how to work through it:

1. Calculate total activity: Determine the aggregate activity in your package. Is it under A2 (or A1 for special form)?
2. Calculate specific activity: Divide total activity by total mass. Compare against the LSA subcategory limits in 49 CFR 173.403.
3. If both qualify: You have the choice. Default to the LSA/Industrial Package pathway unless there is a specific reason to use Type A.
4. If only one qualifies: Use the classification that applies. Material over A2 total activity but meeting LSA limits — ship as LSA in IPs. Material under A2 but above LSA specific activity limits — ship as Type A.

When Type A Might Be the Better Call

The LSA pathway is almost always the cost-effective choice for bulk material. But there are situations where Type A packaging makes more sense even when LSA is an option:

• Small packages: If you are shipping a single small container, the cost difference between an IP and a Type A drum may be negligible. The Type A package you already have on the shelf might be the fastest option.
• Mixed shipments: If the rest of your shipment is already in Type A packages, it may be simpler operationally to keep everything under the same classification rather than mixing LSA and Type A on the same conveyance.
• Carrier familiarity: Some carriers are more experienced with Type A shipments than LSA/Industrial Package shipments. If your carrier has specific procedures for Type A but no established process for LSA, the operational risk of confusion may outweigh the cost savings.
• Receiving facility requirements: Some waste disposal facilities or receiving sites specify packaging requirements that may favor Type A regardless of what the regulations allow.

That being said, for any project involving more than a handful of packages, the savings from the LSA pathway add up quickly. The situations above are real but uncommon for the volume-driven projects where LSA classification matters most.

What About SCO?

Surface contaminated objects (SCO) follow a similar logic. If you have solid objects with surface contamination that meets the SCO-I or SCO-II limits, those objects can also ship in Industrial Packages rather than Type A containers. The same choice exists — and the same cost savings apply.

The distinction is that SCO classification is based on surface contamination levels (Bq/cm²), not specific activity (Bq/g). The object itself is not radioactive — only the surfaces are contaminated. Think contaminated tools, pipes, equipment removed from hot zones. If the surface contamination is within SCO limits, Industrial Packages are sufficient.

Here is the reality: on decommissioning projects, you typically have a mix of both. Contaminated soil and rubble is LSA material. Contaminated equipment and tools are SCO. Both can go in Industrial Packages when properly classified. I have seen projects where the team was putting contaminated wrenches in Type A packages because they did not think to check the SCO classification. A simple wipe test and direct survey would have confirmed SCO-I and saved them the Type A overhead on every tool shipment.

Quick Reference: Minimum Industrial Package by Category

When you choose the LSA pathway, Table 6 of 49 CFR 173.427 tells you the minimum Industrial Package type required:

How RadShip.com Helps

RadShip.com takes the guesswork out of the LSA vs Type A decision:

• RAMcalc — Enter your isotope and quantity. It automatically calculates specific activity, checks against all three LSA subcategory limits, and tells you whether the LSA pathway is available — including the required Industrial Package type.
• Compares total activity against A2 limits simultaneously, so you can see both classifications side by side
• Generates compliant shipping papers with the correct UN number, proper shipping name, and all required Class 7 entries for whichever pathway you choose

Here is why this matters: the specific activity calculation itself is not complicated, but it requires looking up the correct A2 value from 49 CFR 173.435, applying the right LSA limit based on physical form, and comparing against the correct subcategory. When you are processing multiple waste streams with different isotopes, doing this manually for every package is where errors creep in. Having a tool that handles the lookups and comparisons instantly means you catch every opportunity to use the cheaper LSA pathway — and you never accidentally miss one.

Try it free for 7 days.

Common Questions

If my material qualifies as LSA, am I required to ship it as LSA?

No. The regulations allow you to use more protective packaging than the minimum required. You can always ship LSA material in a Type A or even Type B package. The LSA classification gives you the option to use less restrictive Industrial Packaging — it does not require it. Most of the time, the IP option is the smart choice for bulk material, but you are never forced into it.

Does the UN number change based on which packaging I choose?

It depends on the classification, not the packaging. If the material meets LSA definitions, it is LSA material regardless of what package you put it in. The UN number (UN2912 for LSA, for example) stays the same whether you use an IP-2 or a Type A drum. However, the shipping paper entry will reflect the package type used.

Can material be too active for LSA but still be Type A quantity?

Yes. A small sealed source with high specific activity (above LSA limits) but total activity under A1 or A2 would be Type A quantity but not LSA. In this case, you must use a Type A package — the LSA pathway is not available. This is common with special form sources and small-volume, high-concentration material.

What about material that exceeds Type A limits but qualifies as LSA?

This is where LSA classification really shines. If your total activity exceeds A2 (which would require a Type B package under normal classification), but the specific activity still meets LSA limits, you can ship in Industrial Packages under the LSA pathway. This is extremely common with large-volume, low-concentration waste. Without the LSA classification, you would need an NRC-approved Type B package — which is orders of magnitude more expensive. The LSA classification effectively rescues these shipments from Type B requirements.

In my professional opinion, the LSA classification is one of the most underutilized cost-saving tools in radioactive material shipping. It exists specifically because the regulations recognize that material with low activity concentration poses fundamentally less risk in an accident scenario, and the packaging requirements should reflect that reduced risk. Too many shippers leave this tool on the table because they default to the total activity approach without checking specific activity. If you ship any volume of low-level waste, learning to recognize the LSA opportunity should be near the top of your priority list.

Summary: Your LSA vs Type A Decision Checklist

Before defaulting to Type A packaging for your next shipment:

• ☐ Calculate specific activity (total activity ÷ total mass)
• ☐ Compare against LSA subcategory limits in 49 CFR 173.403 (LSA-I, LSA-II, or LSA-III)
• ☐ Determine physical form (solid, liquid, gas) — affects which LSA limits apply
• ☐ If LSA qualifies, identify the correct subcategory and minimum IP type from Table 6 of 49 CFR 173.427
• ☐ Determine exclusive use vs non-exclusive use (affects minimum IP type)
• ☐ Confirm fissile status — non-fissile or fissile-excepted for UN2912
• ☐ Check conveyance activity limits (Table 5 of 173.427)
• ☐ Apply radioactive labels and calculate Transport Index
• ☐ Prepare shipping papers with correct UN number and proper shipping name
• ☐ Document the classification basis (specific activity calculation) in your records

Regulatory References

DOT Requirements:

• 49 CFR 173.403 — Definitions (LSA-I, LSA-II, LSA-III, specific activity, A2, exclusive use)
• 49 CFR 173.427 — Transport requirements for LSA material and SCO (Table 5 & Table 6)
• 49 CFR 173.431 — Activity limits for Type A and Type B packages
• 49 CFR 173.410 — General design requirements (IP-1 basis)
• 49 CFR 173.412 — Additional design requirements for Type A packages
• 49 CFR 173.435 — Table of A1 and A2 values
• 49 CFR 173.462 — Free drop test (IP-2, IP-3)
• 49 CFR 173.464 — Stacking test (IP-2, IP-3)